Katherine Johnson, 98, joined the film’s stars Taraji P. Henson, Janelle Monáe and Octavia Spencer on stage as they revealed the winner for Best Documentary Feature. But before they made the announcement, Henson, who plays Johnson in the film, praised the retired mathematician for being “a true NASA and American hero.”

“Hidden Figures” is partially inspired by Johnson, and tells the story of three African American women and their accomplishments at NASA in the 1960s.

Johnson worked at NASA for more than 30 years as a research mathematician, according to the agency’s website. During her career, she not only helped launch the first American into space, but she also helped John Glenn to become the first American to orbit the Earth.

Thanks to this small tribute at the Oscars, Johnson is no longer a hidden figure. Bravo!